New to site- SIRT, chemo and cirrhosis

I'm new to the site. My Dad who is 77 had colon C surgery in 2009 with 2 mets to the liver. He did chemo and 2 treatments of SIRT which killed the tumors. We later found he could have had resection but was mis advised. He developed ascites within the last 6 months and now has two new tumors. We are looking for options now. He has cirrhosis so the surgery is out. I dont know where the cirrhosis came from - either the SIRT or the chemo. Drs don't say much. We could do SIRT again,but if it caused the cirrhosis then I dont want to do that. If it was the chemo, then Im afraid of that. I dont want to risk any function that he might have. Has anyone had experience with this? We couldtry TACE but thats directed chemo too. What abiut cyberknife or nanoknife? Any insight to any of this would be appreciated.